Furnace-valve for hot-blast stoves



(No Model.) zsheecs-sheet 1. J. KENNEDY. EURNACE VALVE EUR EOT BLASTSTOVES No. 593,476. Patented Nov. 9,1897.

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J. KENNEDY. FURNAGE VALVE FOR HOT BLAST STOVBS. i No. 593,476. PatentedNov. 9, 1897.

WITNESSES E INVENTOR UNITED STATES v PATENT OFFICE.

JULIAN KENNEDY, OE PITTSBURG, PENNSYLVANIA.

yFUFtNACE-VALVE FOR HOT-BLAST STOVES.

SPECIFICATION forming part of Letters Patent N o. 593,476, datedNovember 9, 1897.

Application filed August l5, 1896.

To @ZZ whom, itmay concern.:

.Be it known that I, JULIAN KENNEDY, of Pittsburg, in the county ofAllegheny and State of Pennsylvania, have invented a new and usefulImprovement in Furnace-Valves for Hot-Blast Stoves, of which thefollowing is a full, clear, and exact description, reference being hadto the accompanying drawings, forming part of this specification, inwhich- Figure l shows my improved valve in plan view, the valve-Casin gbeing in horizontal section. Fig. 2 is a vertical section on the line IIII of Fig. 1 and Eig. 3 is an end elevation of the valve, the casingbeing shown as in section on J[he line III III of Fig. l.

The valve is principally designed for use in hot-blast stoves.

2 is the gas main or flue, in which the valve is inclosed. v

3 is the valve-seat, consisting of an annular metal casting with hollowrim, through which water may be caused to iiow for the purpose ofcooling the seat, and the seat is confined between sections of the flue2 between metal castings 4 5, the castingforming part of thevalve-casing. v

6 is the valve, composed of a metal disk adapted to slide horizontallyto and from the seat 3, the valve-casing extending laterally for thatpurpose and having an external and removable cap 7. Raised ribs orridges 8 are formed on the valve-casing to constitute slides upon whichthe disk may move. For the purpose of moving the disks I employarotatory shaft 9,which extends vertically through and into the casingand through a stuffingbox l0, which may be packed, so as to prevent theescape of gas. Vithin the casing this shaft is keyed to the horizontalcrank-arm ll,

Serial No. 602,828. (No model.)

having at the end a connecting rod or link 12, pivoted to a pin or stud13 at the center of the valve, so that when the shaft 9 is rotated by asuitable lever oi' handle at the exterior of the casing it will swingthe crank-arm l1 radially and will move the valve-disk horizontally, asindicated by full and dotted 'lines in Fig. l, the full lines showingthe position of the valve when open and the dotted lines showing thesame when closed.

To prevent upward movement of the valve when closed if blast wereinadvertently admitted beneath it, I provide a series of lugs 14, whichproject inwardly from the casing and serve to hold the valve in place.

The stung-box l0 is formed at the plane of division between the cap 7and the body of the valve-casing, so that on removing said cap thestuffing-box will be exposed. The parts are thus rendered easy toassemble, and a gas-tight connection can readily be made. This is apoint of substantial advantage.

In a furnace-valve, the combination with a sliding valve andvalve-casing, of a rotatory operating-shaft extending through a stufngbox into the casing, a crank-arm having a link connection containedwithin the easing and serving to transmitmotion from the shaft to thevalve, and a removable cap for said casing, the division-line betweenthe cap and casing extending through the stuffing-box; substantially asdescribed.

In testimony whereof I have hereunto set my hand.

` JULIAN KENNEDY. Witnesses:

G. I. I-IoLDsHIP, H. M. CoRwIN.

